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[lotest] Include sequence number within loopback test packets

Include a sequence number as the first four bytes of the loopback test
packet payload.  When a content mismatch occurs, this gives some
information about the source of the mismatched packet.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
tags/v1.20.1
Michael Brown 11 년 전
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c0d2aebdcf
1개의 변경된 파일18개의 추가작업 그리고 8개의 파일을 삭제
  1. 18
    8
      src/usr/lotest.c

+ 18
- 8
src/usr/lotest.c 파일 보기

@@ -175,7 +175,8 @@ static int loopback_wait ( struct net_device *receiver, void *data,
175 175
  */
176 176
 int loopback_test ( struct net_device *sender, struct net_device *receiver,
177 177
 		    size_t mtu ) {
178
-	uint8_t buf[mtu];
178
+	uint8_t *buf;
179
+	uint32_t *seq;
179 180
 	struct io_buffer *iobuf;
180 181
 	unsigned int i;
181 182
 	unsigned int successes;
@@ -193,6 +194,14 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
193 194
 	if ( ( rc = iflinkwait ( receiver, LINK_WAIT_MS ) ) != 0 )
194 195
 		return rc;
195 196
 
197
+	/* Allocate data buffer */
198
+	if ( mtu < sizeof ( *seq ) )
199
+		mtu = sizeof ( *seq );
200
+	buf = malloc ( mtu );
201
+	if ( ! buf )
202
+		return -ENOMEM;
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+	seq = ( ( void * ) buf );
204
+
196 205
 	/* Print initial statistics */
197 206
 	printf ( "Performing loopback test from %s to %s with %zd byte MTU\n",
198 207
 		 sender->name, receiver->name, mtu );
@@ -211,17 +220,17 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
211 220
 		printf ( "\r%d", successes );
212 221
 
213 222
 		/* Generate random packet */
214
-		for ( i = 0 ; i < sizeof ( buf ) ; i++ )
223
+		*seq = htonl ( successes );
224
+		for ( i = sizeof ( *seq ) ; i < mtu ; i++ )
215 225
 			buf[i] = random();
216
-		iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( buf ) );
226
+		iobuf = alloc_iob ( MAX_LL_HEADER_LEN + mtu );
217 227
 		if ( ! iobuf ) {
218 228
 			printf ( "\nFailed to allocate I/O buffer" );
219 229
 			rc = -ENOMEM;
220 230
 			break;
221 231
 		}
222 232
 		iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
223
-		memcpy ( iob_put ( iobuf, sizeof ( buf ) ),
224
-			 buf, sizeof ( buf ) );
233
+		memcpy ( iob_put ( iobuf, mtu ), buf, mtu );
225 234
 
226 235
 		/* Transmit packet */
227 236
 		if ( ( rc = net_tx ( iob_disown ( iobuf ), sender,
@@ -233,10 +242,8 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
233 242
 		}
234 243
 
235 244
 		/* Wait for received packet */
236
-		if ( ( rc = loopback_wait ( receiver, buf,
237
-					    sizeof ( buf ) ) ) != 0 ) {
245
+		if ( ( rc = loopback_wait ( receiver, buf, mtu ) ) != 0 )
238 246
 			break;
239
-		}
240 247
 	}
241 248
 
242 249
 	printf ( "\n");
@@ -246,5 +253,8 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
246 253
 	ifstat ( sender );
247 254
 	ifstat ( receiver );
248 255
 
256
+	/* Free buffer */
257
+	free ( buf );
258
+
249 259
 	return 0;
250 260
 }

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